A theme is a combination of one or more slide layouts with coordinating
colorsA set of colors that is used in a file. Theme colors, theme fonts, and theme effects compose a theme., a matching background,
fontsA major and minor font that is applied to a style. Theme colors, theme fonts, and theme effects compose a theme., and
effectsA set of visual attributes that is applied to elements in a file. Theme colors, theme fonts, and theme effects compose a theme.. In PowerPoint, all presentations must contain a theme. Therefore, when you remove a theme, you must change to a different theme. If your goal is to display very little or no color in your presentation (a plain look and feel), apply the default White Theme. You can choose a theme when you start a new presentation, or apply a theme to all slides or a group of slides as you go.
 | Change the theme when you start a new presentation |
When you open a new presentation, the default theme is used. However, if you know which theme you want for your presentation, you can select it when you start a new presentation. The theme is applied to each new slide you add.
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On the Standard toolbar, click New from template
.
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In the left navigation pane, under THEMES, click either All or My Themes.
There will be themes in the My Themes folder only if you previously saved a custom theme to this folder.
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Click the theme that you want, and then click Choose.
 | Change the current theme |
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On the Themes tab, under Themes, click the theme that you want.

To see more themes, point to a theme, and then click
.
 | Change the theme to a blank document |
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On the Themes tab, under Themes, click White.

To see more themes, point to a theme, and then click
.
 | Change the theme of one or more slides |
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In the navigation pane, click one slide, and then if you want to select more than one slide, hold down
⌘
and click the slides that you want to apply the theme to.
 | How to select slides in the navigation pane
|
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On the Themes tab, under Themes, point to the theme that you want, hold down
CONTROL, and then click Apply to Selected Slides.

To see more themes, point to a theme, and then click
.